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Lateral view of a Female Hexagenia limbata (Ephemeridae) (Hex) Mayfly Dun from the Namekagon River in Wisconsin
Hex Mayflies
Hexagenia limbata

The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.

Dorsal view of a Holocentropus (Polycentropodidae) Caddisfly Larva from the Yakima River in Washington
This one seems to tentatively key to Holocentropus, although I can't make out the anal spines in Couplet 7 of the Key to Genera of Polycentropodidae Larvae nor the dark bands in Couplet 4 of the Key to Genera of Polycentropodidae Larvae, making me wonder if I went wrong somewhere in keying it out. I don't see where that could have happened, though. It might also be that it's a very immature larva and doesn't possess all the identifying characteristics in the key yet. If Holocentropus is correct, then Holocentropus flavus and Holocentropus interruptus are the two likely possibilities based on range, but I was not able to find a description of their larvae.
27" brown trout, my largest ever. It was the sub-dominant fish in its pool. After this, I hooked the bigger one, but I couldn't land it.
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Troutnut.com User Pbaerman (Peter Baerman)

Troutnut.com User Pbaerman (Peter Baerman)

Real Name
Peter Baerman
Location
Rochester, Minnesota
Biography & Thoughts
A fellow trout nut that came up fishing trout in the UP of Michigan as well as steelhead and trout all over lower Michigan with my father and grandfather (luckilly still do). I have recently relocated to Rochester Minnesota and am continuing the persuit of trout in South Eastern Minnesota, where the larget brown on an fly(21.5" female) i have had the pleasure to catch and release has come from.
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Many men go fishing all of their lives without knowing that it is not fish they are after. ~Henry David Thoreau

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